Access Violation While Platesolving in BYN Using ASTAP

[acatalano]

I am using BYN V 2.1.1 RC3 together with ASTAP to platesolve. I also use Cartes du Ciel as my planetarium program. It has been a great relief to finally get platesolving to work after the frustrating experience using Astrotortilla. However most recently,and for reasons I do not understand I am getting "Access Violation OK to ignore and risk data corruption or Abort to Kill". CDC is communicating perfectly with BYN and importing coordinates, but when I go to platesolve, after a short time a window pops up from ASTAP that seems to indicate it is searching within a 180 degree range and the number of degress is rapidly decreasing until around 55 degrees or so (notthe same value each time) the Access Violation! window pops up and ASTAP halts. In thepast I have clicked OK to proceed and the program has moved ahead, but most of the times after freezing I need to restart BYN. I'm wondering if there is anyone else experiencing this and if there is a known cause/solution.

[admin]

Once the command is sent to ASTAP for plate solving BYE/BYN is in for the ride and is waiting for ASTAP to complete.  Based on your description this error seems to originate from ASTAP.  

Have you tried to solve directly in ASTAP to see if you get the same error?  If yes, I would suggest reporting this to ASTAP.

Keep us posted.

[acatalano]

I got a reply from Han on this error. One cause of the error is 2 versions of ASTAP running at the same time. I've seen that before when I was using BYN and ASTAP  simultaneously. However in this case it appears that the program was searching in a wide range (180 degrees) and could not solve. Either the photos were of too poor quality or underexposed. In my case I had just installed an OAG and was trying to obtain better focus, so that was almost certainly the problem. Also, my exposures were relatively short and did not produce many stars either. So I've refined (I hope) my focus with the OAG during the daytime, and that will permit me to move on. Just waiting for a decent, cloudless evening to try it all out.

[admin]

BYN/BYE sets it to 180 range to -allow- blind solve... perhaps I could make this a configuration with something like 20 degrees default.  I'll add this to my to-do list.

[astroman133]

You might want to set it to 180 degrees but reduce it to 10 degrees if you can get a hint from the telescope's position.